2x5v

80 microsecond laue diffraction snapshot from crystals of a photosynthetic reaction centre 3 millisecond following photoactivation.

Method: X-RAY DIFFRACTION

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1. Protein Identity and Related Structures Protein Identity & Related Structures

PHOTOSYNTHETIC REACTION CENTER CYTOCHROME C SUBUNIT

OrganismNot specified

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein heterocomplex	Heteromer	Protein 4	REACTION CENTER PROTEIN H CHAIN × 1 （P06008） REACTION CENTER PROTEIN L CHAIN × 1 （P06009） REACTION CENTER PROTEIN M CHAIN × 1 （P06010） HEME C × 4 BACTERIOCHLOROPHYLL B × 4 BACTERIOPHEOPHYTIN B × 2 FE (II) ION × 1 MENAQUINONE-7 × 1 water × 2	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	CYCR_RHOVI
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain C； PDBConstruct 1–336； UniProt 21–356

REACTION CENTER PROTEIN H CHAIN

OrganismNot specified

UniProt P06008

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein heterocomplex	Heteromer	Protein 4	PHOTOSYNTHETIC REACTION CENTER CYTOCHROME C SUBUNIT × 1 （P07173） REACTION CENTER PROTEIN L CHAIN × 1 （P06009） REACTION CENTER PROTEIN M CHAIN × 1 （P06010） HEME C × 4 BACTERIOCHLOROPHYLL B × 4 BACTERIOPHEOPHYTIN B × 2 FE (II) ION × 1 MENAQUINONE-7 × 1 water × 2	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	RCEH_RHOVI
Isoform	—
PDB entities	2
Chains and sequence ranges	Author chain H； PDBConstruct 1–258； UniProt 1–258

REACTION CENTER PROTEIN L CHAIN

OrganismNot specified

UniProt P06009

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein heterocomplex	Heteromer	Protein 4	PHOTOSYNTHETIC REACTION CENTER CYTOCHROME C SUBUNIT × 1 （P07173） REACTION CENTER PROTEIN H CHAIN × 1 （P06008） REACTION CENTER PROTEIN M CHAIN × 1 （P06010） HEME C × 4 BACTERIOCHLOROPHYLL B × 4 BACTERIOPHEOPHYTIN B × 2 FE (II) ION × 1 MENAQUINONE-7 × 1 water × 2	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	RCEL_RHOVI
Isoform	—
PDB entities	3
Chains and sequence ranges	Author chain L； PDBConstruct 1–274； UniProt 1–274

REACTION CENTER PROTEIN M CHAIN

OrganismNot specified

UniProt P06010

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein heterocomplex	Heteromer	Protein 4	PHOTOSYNTHETIC REACTION CENTER CYTOCHROME C SUBUNIT × 1 （P07173） REACTION CENTER PROTEIN H CHAIN × 1 （P06008） REACTION CENTER PROTEIN L CHAIN × 1 （P06009） HEME C × 4 BACTERIOCHLOROPHYLL B × 4 BACTERIOPHEOPHYTIN B × 2 FE (II) ION × 1 MENAQUINONE-7 × 1 water × 2	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	RCEM_RHOVI
Isoform	—
PDB entities	4
Chains and sequence ranges	Author chain M； PDBConstruct 1–324； UniProt 1–324

The page prioritizes protein identity, the current assembly, associated components, oligomeric state and cross-PDB links. Chain mapping and sequence ranges are retained as data evidence. Internal IDs, import timestamps and assembly operation expressions are maintenance fields and are not shown here.

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2. Structure Basics 2. Structure Basics

Entry ID entry_id	2x5v
Deposition date deposition_date	2010-02-10
Structure title title	80 microsecond laue diffraction snapshot from crystals of a photosynthetic reaction centre 3 millisecond following photoactivation.
Keywords keywords	;LIPIDIC-SPONGE PHASE, PHOTOSYNTHESIS, ELECTRON TRANSPORT, CELL MEMBRANE, METAL-BINDING, TRANSMEMBRANE, FORMYLATION, LIPOPROTEIN, LIPIDS, TRANSPORT ;; PHOTOSYNTHESIS
Experimental Method method	X-RAY DIFFRACTION

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3. Official assembly/model SAXS Official SAXS Profiles

This page reads only the latest assembly calculations. Every curve maps to an explicit PDB entry, official biological assembly and coordinate model.

2x5v__assembly_1__model_1

Assembly 1 · Model 1 · CRYSOL 4.1.3-1-20251215 (887e7ef)

Download this curve (.dat)

2x5v__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

2x5v__assembly_1__model_1 | P(r) · Pending

P(r) will be calculated and displayed separately for the same assembly/model.

Rg（Guinier）	36.85 Å
Rg (electron density)	36.00 Å
Total Rg	36.65 Å
Atom count	9844
Residues	1170
Excluded volume	177500 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`2x5v__assembly_1__model_1`	tetrameric （4）	Success	4.1.3-1-20251215 (887e7ef)	View Download

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4. Crystallography and Experiment 4. Crystallography & Experiment

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5. Entities and Polymers Entities & Polymers (10)

Entity 1 Entity 1 polymer

Description description	PHOTOSYNTHETIC REACTION CENTER CYTOCHROME C SUBUNIT
Molecular weight formula_weight	37450.8 kDa
Source method src_method	nat
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	C
Atom count atom_count	9871

CFEPPPATTTQTGFRGLSMGEVLHPATVKAKKERDAQYPPALAAVKAEGPPVSQVYKNVKVLGNLTEAEFLRTMTAITEWVSPQEGCTYCHDENNLASEAKYPYVVARRMLEMTRAINTNWTQHVAQTGVTCYTCHRGTPLPPYVRYLEPTLPLNNRETPTHVERVETRSGYVVRLAKYTAYSALNYDPFTMFLANDKRQVRVVPQTALPLVGVSRGKERRPLSDAYATFALMMSISDSLGTNCTFCHNAQTFESWGKKSTPQRAIAWWGIRMVRDLNMNYLAPLNASLPASRLGRQGEAPQADCRTCHQGVTKPLFGASRLKDYPELGPIKAAAK

Entity 2 Entity 2 polymer

Description description	REACTION CENTER PROTEIN H CHAIN
Molecular weight formula_weight	28557.5 kDa
Source method src_method	nat
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	H

MYHGALAQHLDIAQLVWYAQWLVIWTVVLLYLRREDRREGYPLVEPLGLVKLAPEDGQVYELPYPKTFVLPHGGTVTVPRRRPETRELKLAQTDGFEGAPLQPTGNPLVDAVGPASYAERAEVVDATVDGKAKIVPLRVATDFSIAEGDVDPRGLPVVAADGVEAGTVTDLWVDRSEHYFRYLELSVAGSARTALIPLGFCDVKKDKIVVTSILSEQFANVPRLQSRDQITLREEDKVSAYYAGGLLYATPERAESLL

Entity 3 Entity 3 polymer

Description description	REACTION CENTER PROTEIN L CHAIN
Molecular weight formula_weight	30600.3 kDa
Source method src_method	nat
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	L

MALLSFERKYRVRGGTLIGGDLFDFWVGPYFVGFFGVSAIFFIFLGVSLIGYAASQGPTWDPFAISINPPDLKYGLGAAPLLEGGFWQAITVCALGAFISWMLREVEISRKLGIGWHVPLAFCVPIFMFCVLQVFRPLLLGSWGHAFPYGILSHLDWVNNFGYQYLNWHYNPGHMSSVSFLFVNAMALGLHGGLILSVANPGDGDKVKTAEHENQYFRDVVGYSIGALSIHRLGLFLASNIFLTGAFGTIASGPFWTRGWPEWWGWWLDIPFWS

Entity 4 Entity 4 polymer

Description description	REACTION CENTER PROTEIN M CHAIN
Molecular weight formula_weight	36063.4 kDa
Source method src_method	nat
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	M

MADYQTIYTQIQARGPHITVSGEWGDNDRVGKPFYSYWLGKIGDAQIGPIYLGASGIAAFAFGSTAILIILFNMAAEVHFDPLQFFRQFFWLGLYPPKAQYGMGIPPLHDGGWWLMAGLFMTLSLGSWWIRVYSRARALGLGTHIAWNFAAAIFFVLCIGCIHPTLVGSWSEGVPFGIWPHIDWLTAFSIRYGNFYYCPWHGFSIGFAYGCGLLFAAHGATILAVARFGGDREIEQITDRGTAVERAALFWRWTIGFNATIESVHRWGWFFSLMVMVSASVGILLTGTFVDNWYLWCVKHGAAPDYPAYLPATPDPASLPGAPK

Entity 5 Entity 5 non-polymer

Description description	HEME C
Molecular weight formula_weight	618.5 kDa
Source method src_method	syn
Copy count entity_count	4

Entity 6 Entity 6 non-polymer

Description description	BACTERIOCHLOROPHYLL B
Molecular weight formula_weight	909.5 kDa
Source method src_method	syn
Copy count entity_count	4

Entity 7 Entity 7 non-polymer

Description description	BACTERIOPHEOPHYTIN B
Molecular weight formula_weight	887.2 kDa
Source method src_method	syn
Copy count entity_count	2

Entity 8 Entity 8 non-polymer

Description description	FE (II) ION
Molecular weight formula_weight	55.8 kDa
Source method src_method	syn
Copy count entity_count	1

Entity 9 Entity 9 non-polymer

Description description	MENAQUINONE-7
Molecular weight formula_weight	649.0 kDa
Source method src_method	syn
Copy count entity_count	1

Entity 10 Entity 10 water

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	2

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6. Fold Classification (SCOP + CATH) 13 domains

SCOP 2.08 (5 domains)

Domain ID domain_id	d2x5vc_
Class class	a — All alpha proteins
Fold Fold fold	a.138 — Multiheme cytochromes
Superfamily Superfamily superfamily	a.138.1 — Multiheme cytochromes
Family Family family	a.138.1.2 — Photosynthetic reaction centre (cytochrome subunit)

Domain ID domain_id	d2x5vh1
Class class	f — Membrane and cell surface proteins and peptides
Fold Fold fold	f.23 — Single transmembrane helix
Superfamily Superfamily superfamily	f.23.10 — Photosystem II reaction centre subunit H, transmembrane region
Family Family family	f.23.10.0 — automated matches

Domain ID domain_id	d2x5vh2
Class class	b — All beta proteins
Fold Fold fold	b.41 — PRC-barrel domain
Superfamily Superfamily superfamily	b.41.1 — PRC-barrel domain
Family Family family	b.41.1.1 — Photosynthetic reaction centre, H-chain, cytoplasmic domain

Domain ID domain_id	d2x5vl_
Class class	f — Membrane and cell surface proteins and peptides
Fold Fold fold	f.26 — Bacterial photosystem II reaction centre, L and M subunits
Superfamily Superfamily superfamily	f.26.1 — Bacterial photosystem II reaction centre, L and M subunits
Family Family family	f.26.1.1 — Bacterial photosystem II reaction centre, L and M subunits

Domain ID domain_id	d2x5vm_
Class class	f — Membrane and cell surface proteins and peptides
Fold Fold fold	f.26 — Bacterial photosystem II reaction centre, L and M subunits
Superfamily Superfamily superfamily	f.26.1 — Bacterial photosystem II reaction centre, L and M subunits
Family Family family	f.26.1.1 — Bacterial photosystem II reaction centre, L and M subunits

CATH v4.4 (8 domains)

Domain ID domain_id	2x5vC01
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	468 — Photosynthetic Reaction Center, subunit C; domain 2
Homologous superfamily homologous superfamily	10 — Photosynthetic Reaction Center, subunit C, domain 2

Domain ID domain_id	2x5vC02
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	468 — Photosynthetic Reaction Center, subunit C; domain 2
Homologous superfamily homologous superfamily	10 — Photosynthetic Reaction Center, subunit C, domain 2

Domain ID domain_id	2x5vH01
Class class	4 — Few Secondary Structures
Architecture architecture	10 — Irregular
Topology topology	540 — Photosynthetic Reaction Center; Chain H, domain 1
Homologous superfamily homologous superfamily	10 — Photosynthetic reaction centre, H subunit, N-terminal domain

Domain ID domain_id	2x5vH02
Class class	3 — Alpha Beta
Architecture architecture	90 — Alpha-Beta Complex
Topology topology	50 — Photosynthetic Reaction Center; Chain H, domain 2
Homologous superfamily homologous superfamily	10 — Photosynthetic Reaction Center, subunit H, domain 2

Domain ID domain_id	2x5vL01
Class class	1 — Mainly Alpha
Architecture architecture	20 — Up-down Bundle
Topology topology	85 — Photosynthetic Reaction Center, subunit M; domain 1
Homologous superfamily homologous superfamily	10 — Photosystem II protein D1-like

Domain ID domain_id	2x5vL02
Class class	1 — Mainly Alpha
Architecture architecture	20 — Up-down Bundle
Topology topology	85 — Photosynthetic Reaction Center, subunit M; domain 1
Homologous superfamily homologous superfamily	10 — Photosystem II protein D1-like

Domain ID domain_id	2x5vM01
Class class	1 — Mainly Alpha
Architecture architecture	20 — Up-down Bundle
Topology topology	85 — Photosynthetic Reaction Center, subunit M; domain 1
Homologous superfamily homologous superfamily	10 — Photosystem II protein D1-like

Domain ID domain_id	2x5vM02
Class class	1 — Mainly Alpha
Architecture architecture	20 — Up-down Bundle
Topology topology	85 — Photosynthetic Reaction Center, subunit M; domain 1
Homologous superfamily homologous superfamily	10 — Photosystem II protein D1-like

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Unit-cell length a length_a	85.693 Å
Unit-cell length b length_b	143.470 Å
Unit-cell length c length_c	177.998 Å
Unit-cell angle α angle_alpha	90.00 °
Unit-cell angle β angle_beta	90.00 °
Unit-cell angle γ angle_gamma	90.00 °
Molecules per unit cell Z z_pdb	4

Space group space_group	P 21 21 2
Space-group number int_tables_number	18
Crystal system crystal_system	—

Resolution resolution	3.000 Å
Low-resolution limit resolution_low	46.180 Å
R factor r_factor	0.2787
R_work r_work	0.2765
R_free r_free	0.3194

80 microsecond laue diffraction snapshot from crystals of a photosynthetic reaction centre 3 millisecond following photoactivation.

1. Protein Identity and Related Structures Protein Identity & Related Structures

PHOTOSYNTHETIC REACTION CENTER CYTOCHROME C SUBUNIT

State in the Current Structure

Other States of the Same Protein in the Database

Monomer

Homodimer

Homotetramer

Other homooligomers

Heteromeric or nucleic-acid complex

REACTION CENTER PROTEIN H CHAIN

State in the Current Structure

Other States of the Same Protein in the Database

Monomer

Homodimer

Homotetramer

Other homooligomers

Heteromeric or nucleic-acid complex

REACTION CENTER PROTEIN L CHAIN

State in the Current Structure

Other States of the Same Protein in the Database

Monomer

Homodimer

Homotetramer

Other homooligomers

Heteromeric or nucleic-acid complex

REACTION CENTER PROTEIN M CHAIN

State in the Current Structure

Other States of the Same Protein in the Database

Monomer

Homodimer

Homotetramer

Other homooligomers

Heteromeric or nucleic-acid complex

2. Structure Basics 2. Structure Basics

3. Official assembly/model SAXS Official SAXS Profiles

2x5v__assembly_1__model_1

2x5v__assembly_1__model_1 | I(q)

2x5v__assembly_1__model_1 | P(r) · Pending

4. Crystallography and Experiment 4. Crystallography & Experiment

Unit cell Unit Cell

Symmetry Symmetry

Refinement Refinement

Diffraction experiment Diffraction

5. Entities and Polymers Entities & Polymers (10)

Entity 1 Entity 1 polymer

Polymer Polymer

Entity 2 Entity 2 polymer

Polymer Polymer

Entity 3 Entity 3 polymer

Polymer Polymer

Entity 4 Entity 4 polymer

Polymer Polymer

Entity 5 Entity 5 non-polymer

Entity 6 Entity 6 non-polymer

Entity 7 Entity 7 non-polymer

Entity 8 Entity 8 non-polymer

Entity 9 Entity 9 non-polymer

Entity 10 Entity 10 water

6. Fold Classification (SCOP + CATH) 13 domains

SCOP 2.08 (5 domains)

CATH v4.4 (8 domains)

7. Citations (1)